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Class Information
Number: 237/56
Name: Heating systems > Water
Description: Heating system in which the room or building is heated by the circulation of water or some other liquid.










Sub-classes under this class:

Class Number Class Name Patents
237/59 Circulation 40
237/66 Expansion tanks 39
237/57 Fluid fuel 9
237/65 Pressure regulator 4
237/58 Steam 4


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8387893 Structure and method for constructing 2-ply upper board of dry heating system Mar. 5, 2013
8376243 Boiler with an adjacent chamber and an helicoidal heat exchanger Feb. 19, 2013
8333169 Water heater special for bathroom Dec. 18, 2012
8256690 Radiant heating and cooling panel Sep. 4, 2012
8251021 Hydronic assembly of manifold with hydraulic separator and endsuction pumps Aug. 28, 2012
8016206 Vehicle air conditioning system and automobile having the vehicle air conditioning system Sep. 13, 2011
7857002 Method for isolating an appliance in a plumbing system Dec. 28, 2010
7806346 Cascade unit for a heating system with two or more heating boilers Oct. 5, 2010
7762280 Valve for tankless water heater Jul. 27, 2010
7665459 Enclosed solar collector Feb. 23, 2010
7644730 Method for isolating an appliance in a plumbing system Jan. 12, 2010
7621295 System for controlling fluid flow to an appliance Nov. 24, 2009
7591434 Hot water supply system Sep. 22, 2009
7509927 Hydraulic header for a heating system Mar. 31, 2009
7000847 Quick recovery water heater Feb. 21, 2006
6092734 Manifold for connecting circuits of a central heating system Jul. 25, 2000
5950575 Hydronic manifold Sep. 14, 1999
5881763 System for distributing fluid from a single source to multiple locations Mar. 16, 1999
5829677 Water heating and cooling system having a dual water mixing and air separator apparatus Nov. 3, 1998
5794845 Flow control device and hot-water type heating apparatus employing the same Aug. 18, 1998
5779143 Electronic boiler control Jul. 14, 1998
5775581 Dual heat source heating system Jul. 7, 1998
5749516 Vehicle heater with control device May. 12, 1998
5738277 Water heating and cooling system having a dual water mixing and air separator apparatus Apr. 14, 1998
5718374 Heating device Feb. 17, 1998
5707007 Hydronic heating with continuous circulation supplying multi-temperature heating loops Jan. 13, 1998
5579996 Radiant floor and wall hydronic heating systems Dec. 3, 1996
5390660 Pre-wired and pre-plumbed module for use with an installed hydronic radiant floor heating system Feb. 21, 1995
5381902 Device for supplying a circuit of a heating or cooling supply system Jan. 17, 1995
5377661 Wood burning stove for heating water Jan. 3, 1995
5341843 Plumbing and heating pipe system for water supply purposes, made either completely or mainly of plastic material, especially of polypropylene Aug. 30, 1994
5265673 Compact manifold for a heat exchanger with multiple identical heating tubes Nov. 30, 1993
5111875 Modular heat installation for premises with water as a heat transmitting medium May. 12, 1992
5109807 High output mini hydronic heater May. 5, 1992
4989781 High-efficiency heating unit Feb. 5, 1991
4981263 Paint booth thermal reclamation system for space heating Jan. 1, 1991
4911359 Apparatus for and method of recovering chimney heat Mar. 27, 1990
4813396 Methods and apparatus for changing liquid temperature Mar. 21, 1989
4756475 Gas-fired boiler Jul. 12, 1988
4724798 Outdoor woodburning furnace Feb. 16, 1988
4723705 Device for ventilating a closed conduit system Feb. 9, 1988
4681257 Hot-water-furnace supplemental heater Jul. 21, 1987
4653573 Connecting apparatus for a radiator Mar. 31, 1987
4638853 Apparatus for conditioning and controlling the temperature of rooms in a building Jan. 27, 1987
4623093 Combination discharge and supply fitting for hot water tank Nov. 18, 1986
4612878 Wood-burning heater for circulating water Sep. 23, 1986
4601426 Excess-pressure-free boiler and accumulator heating system Jul. 22, 1986
4593853 Plastic pipe having an oxygen-impermeable casing Jun. 10, 1986
4588124 Heat-exchanging system for an enclosed space May. 13, 1986
4564142 Hydronic system with circulators connected to a header Jan. 14, 1986

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